Fluxx
1997 (2008 version) / Card game / 2-4 players***I was introduced to this chaotic card game in a hostel on my first travel stop in 2010, while appropriately pissed, and found its unstable "rules" and lolR@Nd0mness hilarious in my debilitated state. It'll never be that enjoyable again, but it seemed like a good call for playing with a child who enjoys the similarly swinging futility of Monopoly's Buy Everything expansion when it was going cheap on eBay.
The Action cards are a bit wordy for a six year old who refuses adult assistance, but that doesn't stop her from generally winning after a few turns anyway by randomly matching the goal. It's not exactly the madcap party I remembered. Maybe we need to get pissed?
